दिवो झल्

Operational rule vidhi

After दिव् a case-ending beginning with भ or स is unaccented.

Word by word (padaccheda)

Left context दिवः pañcamī · ekavacanaSubstitute / term prathamā · ekavacana

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Substitute / term Prathamā (1st case): in operational rules, the substitute or the thing introduced; in definitions, the term or its referent.

Dotted words are technical terms, dashed ones pratyāhāras (names for classes of sounds or affixes). Hover or tap one to see its card.

Full reading

दिवः

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

After दिव् a case-ending beginning with भ or स is unaccented.
Thus द्यु꣡भ्याम्, द्꣡युभिः ॥ This debars 6.1.168, 6.1.171. Why do we say 'beginning with a झल् consonant'? Observe दिवा꣡, दिवे꣡ ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.